Most stomach aches in children are short-lived and harmless: constipation, wind, a mild tummy bug or nerves before something big. A small number signal a problem that needs a doctor promptly, and the red flags below tell you which is which. Then there is the third group, which fills our appointment books: tummy pain that keeps coming back while every test comes back normal. That pain is real, it is common, and the gut behind it deserves a proper look.
Key takeaways
- Constipation is the single most common cause of recurring tummy pain in children, and it hides surprisingly well.
- Severe or worsening pain, pain settling in the lower right, fever, blood, vomiting that persists, weight loss or night waking: see a doctor promptly.
- Around 1 in 10 school-aged children gets recurrent tummy pain with no disease found on standard tests.
- "Functional" pain is not imaginary pain: the gut-brain connection produces genuine hurt.
- Your GP rules out medical causes first; ReMed investigates the patterns afterwards, alongside them.
The common causes of stomach aches in children
Constipation tops the list by a wide margin, and it fools parents because a constipated child can still poo every day: small, hard motions with a build-up behind them, sometimes with overflow smears, a bloated belly, a poor appetite and a short fuse. Wind and too-fast eating cause sharp, short-lived pain that shifts around. Gastro bugs announce themselves with vomiting, diarrhoea and a sick household. Worry causes genuine pain too, often on school mornings or Sunday nights, because the gut and the brain share wiring, not because your child is inventing it.
Food is the other repeat offender. Lactose and fructose intolerances classically produce bloating, gurgling, wind and pain an hour or 2 after particular meals, and patterns like this are worth working up methodically rather than by random elimination: that is the territory of food intolerance investigation. A practical first step costs nothing: map a typical week of eating against when the pain shows up with the free nutrition gap checklist, which takes about 2 minutes and gives any practitioner, GP or naturopath, a far better starting point than memory under pressure.
Red flags: when to see a doctor promptly
Some presentations should skip the wait-and-see stage. See your GP promptly, or an emergency department if your child looks unwell and is getting worse, for any of these:
- Pain that is severe, constant or steadily worsening over hours
- Pain that starts around the belly button then settles in the lower right, especially if walking, coughing or jumping hurts
- Fever alongside significant tummy pain
- Blood in the poo or vomit, or vomit that is green
- Vomiting that will not settle, or signs of dehydration
- Pain that wakes your child from sleep
- Weight loss, slowed growth or ongoing diarrhoea
- A hard, swollen or very tender belly, or pain after an injury
None of this list is about alarm; it is about sequence. The list is not exhaustive either, and it never overrides your instinct: you know your child's baseline better than any checklist, so a child who simply seems wrong to you deserves a doctor's eyes even with no boxes ticked. Medical assessment comes first, always, and a GP who knows your child is the right person to decide what needs testing today. Everything else in this article assumes that step has happened.
When every test is normal but the pain is real
Here is the appointment that brings most families to us: the bloods are fine, the scan is clear, nothing is medically wrong, and your child still clutches their tummy most weeks. Doctors call this functional abdominal pain, and it affects around 1 in 10 school-aged children. "Functional" does not mean imaginary. It means the pain comes from how the gut is working, sensitivity of the gut wall, the pace food moves through, the gut-brain conversation, rather than from damage or disease a test can photograph.
That distinction changes the job. Once disease is off the table, the useful work becomes pattern-mapping: when the pain arrives relative to meals, what the bowel habit honestly looks like (most parents stop seeing this once school starts), how sleep has been, what the week's stress load was, and which foods cluster before the bad days. Charted over 2 weeks, recurrent tummy pain almost always shows structure. Structure is something you can work with, and it is precisely what a 10-minute appointment cannot capture.
What the gut angle adds
This is where 19 years of reading children's gut results earns its keep. A stool microbiome map describes the ecosystem your child's digestion runs on: how diverse it is, which key species are abundant or missing, and markers of digestion and inflammation worth attention. Interpreted properly, it explains rather than just describes, and interpreted in a child it reads differently than in an adult, which is exactly why experience matters. It is not a diagnostic shortcut, and it cannot replace the medical work-up your GP has already done.
The same data-first principle applies to fixing things. Fibre variety feeds microbial diversity, fluid and movement keep the bowel rhythm honest, and the constipation cycle, withholding leads to harder stools leads to more withholding, gets broken with patience rather than force. What we do not do is stack probiotics and powders by guesswork: test first, supplement second, and re-check rather than supplementing forever.
Diet diversity matters more here than any single hero food: each new plant food feeds a slightly different set of microbes, which is part of why "eats beige" and "sore tummy" share a sentence so often in our intake notes. The goal is never a perfect diet. It is a slightly wider plate than last month, built without mealtime battles.
How ReMed approaches recurrent tummy pain
The starting point is a 60-minute initial consultation (from $242), long enough to take the full story: birth and antibiotic history, the honest bowel pattern, the food week, the school-stress shape, everything a short consult has to skip. From there, testing is recommended only where the history justifies it, and any plan is built around your actual household: realistic food adjustments, a bowel rhythm strategy, methodical identification of food triggers with no guess-elimination chaos, and support for the worry component where school mornings are part of the picture. Plans are reviewed and adjusted as your child responds, and with your consent everything is shared with your GP or paediatrician so the care joins up. Most parents arrive with a folder of normal results: bring it. Normal results are still data, they narrow the search, and they spare your child repeat tests. Appointments run at Bundoora or by telehealth Australia-wide, with test kits that work from home.
Also worth reading: Are our children well fed? and the signs of anxiety in children worth knowing, because anxious tummies are real tummies.
If your child's tummy pain keeps returning and the answers so far amount to "probably nothing", gut microbiome testing is designed to explain rather than just describe. Send an enquiry and tell us the pattern you are seeing: a real person replies within 1 business day.
ReMed's care is complementary to, not a replacement for, conventional medical care. We work alongside your GP, paediatrician and specialists, and our support is not a substitute for medical diagnosis or treatment. In an emergency call 000. Every child is different: outcomes vary and no specific result can be guaranteed.